On April 26. 1986 an explosion in a reactor in Chernobyl caused enormous damage to the surroundings, and especially to Belarus.
Belarus got 70 % of the contamination. Other countries also got a lot, among them the middle part of Norway.
Unfortunately the western world seem to have forgotten this tragedy at least belarus has fought this struggle alone so far, by a few exceptions from some countries.
Most of the help is done by individuals and private efforts.